Acoustic coupler



FIG. 1 is a front perspective view of an acoustic coupler showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front side elevational view thereof; and

FIG. 8 is a rear side elevational view thereof; and,

FIG. 9 is a right side elevational view of the acoustic coupler attached to an example earpiece and an example cable assembly.

The broken lines in the drawings illustrate environmental features and form no part of the claimed design. 

CLAIM The ornamental design for an acoustic coupler, as shown and described. 